Means for preparing and fixing blasting charges.



PatentedJan. 25, 1 910.

INVENTOR V 677:12166 SZ'ewarZ B hmfy y fi Attorney V C. S. BAHNEY. v MEANS FOR PREPARING AND FIXING BLASTING CHARGES.

' APPLICATION FILED SEPT. 2, 1909.

.1'0 all whom it may concern:

UNITED j STATES PATENT lorries.

CHARLES STEWART BAHNEY, 0F CARTHA'GE, MISSOURI.

MEANS FOR PREPARING AND FIXING BLASTING CHARGES.

Specification of Letters Patent. Patented J an. 25, 1910.

Application filed September 2, 190 9. Serial No. 515,844.

Be it known that. -.I, CnARnns Scrnwaxrr BAH Y, a citizen of the United States, residing at Carthage, in the county of Jasper and State of Missouri, have-invented certain new and usefulImprovements in Means for Preparing and Fixing Blasting Charges, of

which the following isa specification.

This invention relates to the subject of vmining and quarrying, and has special reference to improved means for preparing and fixing blasting charges at the bottom of the drill hole.

To this end the invention has in view cc1' tain novel and practical improvements in the construction of afilling cartridge for blasting-purposes, that is a cartridge carrying filling or confining material adapted to be introduced into the drill hole and liberated over and about the blasting charge. In other words, the present invention pro vides improved means for introducing the blast charge fconfiuing-material into the charge receiving pocket in bulk so that when the taniping nnplement or machine acts upon the same it will be distributed over all parts of the main charge, and also fill all openings and crevices. thereby closely coutining the blasting charge so that the maximum of results will be obtained from the explosion thereof.

In the embodiment of the invention shown in the drawings the preferred way of carrying out the invention is illustrated, though it will be understood that the invention is necessarily susceptibleto structural changes or modification.

' 'In the accompanying drawings, Figure l is a sectional view of a rock face illustrating the application of the invention and showing the blast opening drilled in the rock and the pocket or cavity which has been squibbed for the reception of the main blast charge... Fig. 2 is a similar view showing thecollapsible cartridge shattered to release the confining-material and thus admit of the squibbed pocket or cavity being readily (incompletely filled with the sand or other confining n'latcrial. Figs. 3 and 4 a re longitudinal and cross-sectional views re spect-ively of one. term of collapsiblecartridge that mav be utilized in carrying out the invention.

may be employed. Fig. 7 is a detail plan View of the slitted sheet or board in blank form. e

Like references designate corresponding parts in the several figures of the drawings.

Referring to the drawings, the number 10 designates a mining tunnel or rock face having a blast opening 11 drilled therein, at the inner end of which opening amain charge-receiving pocket l2'has been formed by the usual preliminary-explosion or squibbing operation. The main charge 13 which consists of sticks of powder is shown in said pocket with its fuse 14 pr ijecting through the opening. This charge 13 :is intended to be closely confined in thesaid pocket by the confining material 15, preferably sand.

It has been found that a practical way-to to may be properly characterized as a filling cartridge, and according to the present invention this cartridge consists of a tubular paper body 16, and the paper or equivalent covering sheet 17 therefor.

In the .form of theinvention shown in Figs. 3 and 4 the paper body or wrapper 16 is made of a single sheet of aper, preferably cardboard, rolled into the form of a cylindrical tube, with its overlapping edges 18 and 19 left loose and unsealed so as-to not interfere with the ready breaking and open-' ing up of the cartridge when the tamping tool isj'orced against the same. In connection with the formation of the tubular pa er body 16 an important and distinctive eature of the invention resides in preliminarily providing theblank or sheet of material from which said body is made with a multiplicity of transverse, or otherwise disposed.

slits 20. These slits contribute materially .to the ready destructibility of the cartridges o'r tubes under the pressure of the tampi'ng implement. Furthermore, another impor- Til ti I drawings.

Ttltltflltti the position indicated in Fig. 1 2t 'ttllli feature of the invention is to not only incl: or clot-1e in the entl portions 2] of the ol'n'erin r sheet IT. at the L'lltlS of the emtritl sl'e or tulle, but. also to seal aneh entl portions :31 l) meant of glue or other adhesive tanning upon the inner sitle oi Flitjll entil, lhiss eonetruetion provides in etleet :1 glued or mlhesively sealed plug for the ends of the eurtritlge or tube to hold the sand in posi tion and ],'ll't' "-'t.lll the bursting out or leaking; ol the same llrom ortlinnnv handling of: the en rt ritlgyge.

ln the torn! oi the invention shown in t 3 and 6 oil theltli-rnvings the tubular paper hotly or wrapper shown as eonsislinghot two sepzirulelnhes 17 arranged in to esenpirn;relation, lnitfotherwise of the seine(construction as the tube or l)t.)(l U in the one pieee form of the invention.

in ltHlI'lQ the cartridges they are intro tineetl through the (lrill hole and pressed lmrlt into the charge-contining poelt't-t r entity 1; by IHUHHH ol an ordinary tznnpinp tool Hltl] :ts llltllt'lllttl h) 'l in Fig. l of the When the tlestruetihle cartridge unwilling pressure itnposetllthereon liy the tempting tool willeei've to break and open up the eurtrnlge. with the result of scattersemen ing the filling material, into thepoeketl] so that it may be as tightly tamped thereil tlF desired. One or more collapsible filling cartridges may be utilized in this manner for the purpose described, according to the size of the chargwcontainmg pocket or cavity.

1. A filling cartridge for blasting purposes consisting a tubular destructihle paper hotly provided with a multiplicity of elit therein and containing filling material.

J. tillingfeartrirlge for blasting pun poses eonnisting of 21 plestrnetihle paper horljt' provided with :1 covering aheet adhesively enletl at its ends to the eonfining material within the hotly;

3. A lillingr cartridge for lilztsting purposemzonsisting of a slitterl paper tulle containing lillin g material :nnl provitletl with a coveringsheet :ulhesively sealetl at its entls lo Eilltl material.

In testimony whereof I hereunto tlfllX in signature in the presence of two witnesses.

W itnesses J. 1). Pnmuus, J. P. NEWELL. 

